The answer is, yes, exactly!. Only, it's a hash table that can be shared across all of the different processes on the server. So if you have e.g. two different web requests that want to update some value, then that's how you do that. The other main alternative is a regular database, but that's much heavier and isn't really built in terms of "data structures".
(Redis isn't just a hash table - it's a list, a set, a queue, etc, in other words, all the standard library of a programming language, only in a way that can be shared across all the processes.)
The answer is, yes, exactly!. Only, it's a hash table that can be shared across all of the different processes on the server. So if you have e.g. two different web requests that want to update some value, then that's how you do that. The other main alternative is a regular database, but that's much heavier and isn't really built in terms of "data structures".
(Redis isn't just a hash table - it's a list, a set, a queue, etc, in other words, all the standard library of a programming language, only in a way that can be shared across all the processes.)